<?php
$canshu=$_SERVER["QUERY_STRING"];
if($canshu=="")
{
die("文件不存在");
}
else
{
$wangzhi="http://pan.baidu.com/share/link?".$canshu;
$file=file_get_contents($wangzhi);
$pattern='/a><a class="dbtn cancel singledbtn" href=(.*?)id="downFileButtom">/i';
preg_match_all($pattern,$file,$result);
$tempurl=implode("",$result[1]);
$fileurlt=str_replace("/"","",$tempurl);
$fileurl=str_replace("&","&",$fileurlt);
header("location:$fileurl");
}
?>